""PNG and TIFF also allows partial transparency, which solves the edge limitation problem. However, support is even more patchy. Internet Explorer prior to version 7 does not support partial transparency in a PNG graphic. Very few applications correctly process TIFF files with alpha channels.

So even if you get the export options right, I'm not so confident MS Excel will display it properly. A workaround might be to load the file in MS Word (using whatever format - BMP, JPEG, etc.), use the Picture toolbar (or is it Graphics?) to "click" the color you want transparent, and then copy/paste from MS Word.

CHART

Posted 11 December 2006 - 04:35 PM

CHART

Chart

Validated Member

358 posts

No Country Selected

Ben... is correct tif transparency is best managed by an application. So for example in MapInfo you set the transparency of a tif with the application. So not sure if AutoCad can set the transparency color.

araki5

Posted 11 December 2006 - 07:48 PM

araki5

Key Contributor

Validated Member

77 posts

Gender:Male

Interests:GIS/MAPSERVER/OSSIM/GDAL

United States

hi all. i think i found a solution.

i open up the dwg file i want to export. when i choose export options, i select .wmf. I forgot that when you do that, it will automatically transparentize the white background. not only that, the line work and text is very sharp for such a small exhibit on excel. i can insert image directly inside excel.

it's basically a vector format(who cares) and it seems to print just fine.

Eva

Posted 29 March 2011 - 12:18 PM

Eva

Newbie

Validated Member

1 posts

United States

Randy,

I see you found the answer to your question, but just wanted to give you a tip on using photoshop. If you use the magic wand instead of the lasso it does not matter how steady your hand is. You can play with the tolerance (I have dropped it as low as 0 to get it to capture the image properly) and then just draw a circle encompassing the image and it will snap to your image. You can edit the line by using the shift and alt keys to add or subtract from the line and you can use the feathering tool to smooth the edges if your line is off by a few pixels. I hope that helps in the future. Maybe you will have some insight to my problem listed below:

I am currently trying to figure a way to create a tif with a transparent background. I am then using dmagic to convert the tif to a kml (or kmz) for input to google earth. I first tried in gimp, but had to save as a .png which can be manually georeferenced in dmagic, but will not export to kml. Photoshop allows me to save as a tif with a transparent background, but becomes too large for dmagic to handle and when I compress it dmagic fails or says it cannot read the georeferencing (coordinate system is assumed). I have tried arcmap, and can make the background transparent within the program, but it will not export as transparent. I am now looking into autocad to see if I can make a resonably sized tif image with a transparent background that will export to kml. If anybody has succesfully done this (or determined it impossible) I would greatly appreciate your input!